Patent US2621141A successfully refreshed from Google Patents.
US2621141A
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Method of covering an ironing roll
Assignee: Pittsburgh Waterproof Co
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Filing: 1949-04-19
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Granted: 1952-12-09
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Expires: 1969-04-19
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Obitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:13
CPC Classifications
D; D06; D06F; D06F83/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1771784A
Cited
GB415226A
Cited
US1973044A
Cited
US2191092A
Cited
US2158006A
Cited
US2264731A
Cited
US2272238A
Cited
US2460343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |